“Why did the boy put candy under his pillow?”/“Because he wanted sweet dreams.”

A riddle about “sweet dreams” is:
 
Q: Why did the boy put candy under his pillow?
A: Because he wanted sweet dreams.
   
“Why did the moron bring the sugar to be with him? Because he wanted to have sweet dreams” was printed in a 1949 newspaper. “Why did the moron put candy under his pillow? Because he wanted to have sweet dreams” was printed in a 1956 newspaper.
 
     
Old Fulton NY Post Cards
10 December 1949, Nassau Daily Review-Star (Freeport, NY), “The Cutie Club” by Lynne Carroll, pg. 12, col. 2:
Why did the moron bring the sugar to be with him?
Because he wanted to have sweet dreams.
—Barbara Jankoski, Roosevelt
   
1 March 1953, Leavenworth (KS) Times, “Jokes,” pg. 16, col. 4:
Why did the little moron take some sugar to bed with him?
Answer: Because he wanted to have sweet dreams.
Joyce McNamee, 11
RR 3.
 
12 May 1956, Afro-American (Baltimore, MD), “Riddles,” pg. 20D, col. 5:
Why did the moron take sugar to bed with him?
He wanted sweet dreams.
 
9 June 1956, Afro-American (Baltimore, MD), “Riddles For You,” pg. 21F, col. 3:
Why did the moron put candy under his pillow?
Because he wanted to have sweet dreams.
 
Google Books
The All-New Clean Joke Book
By Bob Phillips
Eugene, OR: Harvest House Publishers
1990
Pg. 170:
SWEET DREAMS
Q. Why did Clarence sprinkle sugar all over his pillow?
A. He wanted to have sweet dreams.
   
Twitter
Dominick White
‏@ddw4e
He wanted sweet dreams? LOL RT @JamesMurphy: (JOKE) Why did the Boy put Sugar on his Pillow!?
3:55 PM - 13 Oct 2009
 
Twitter
Sarah Boller
‏@SarahLBoller
Anders joke of the night: Why did the boy put sprinkles on his pillow? Cause he wanted SWEET dreams!
10:51 PM - 7 Jun 2011
 
Twitter
Karen Luu
‏@Karenluua
Why did the guy sleep with chocolates under his pillow? ..... because he wanted Sweet Dreams ! Hohoho : )
2:19 AM - 20 Aug 2011
 
Google Books
More One Liners, Jokes and Gags
Compiled by Grant Tucker
London: Biteback Publishing
2013
Pg. ?:
Why did the boy put candy under his pillow? Because he wanted sweet dreams.
 
Google Books
1001 Kid’s Jokes
By Kay Barnham
London: Arcgturus Publishing
2016
Pg. ?:
Why did the boy put candy under his pillow?
He wanted sweet dreams.
   
Twitter
Lionel Gilmore
‏@lg16spear
@TheRealMsClarke here’s a Valentine’s Day joke for you: Why did the boy put candy under his pillow? Because he wanted sweet dreams.
8:10 PM - 8 Feb 2017 from Bronx, NY